PMP-25 Pump Load Control Installation, Set-up & Adjustment

The Model PMP-25 monitors the true power going to a motor. By sensing power (volts x amps x power factor) rather than just amps, there is much greater sensitivity. For loss of load detection, this means a 10X improvement in performance.

tel: 713-972-8666 fax: 713-972-8665 www.magnatexpumps.com inquiries@magnatexpumps.com

PMP-

25 P

ump

Prot

ecto

r

CO

PY

RIG

HT

2011

MA

GN

ATE

X P

UM

PS

INC

.

• On door or raceway – use cutout template • Panel Mount – use template + optional Bezel Kit

(No Charge) • On wall – on standard outdoor junction box +

optional • Outlet Box Adapter (No Charge)

Mounting:

Wiring is done to un-pluggable terminal strips on the rear of the unit. Three ways to mount:

Voltage:

120 volts AC is taken from two of the phases. If the motor starter already has a 120-volt control transformer with 10VA of free capacity, it can be used. Otherwise, install a separate transformer. It is okay if the secondary is grounded.BE SURE TO NOTE WHICH TWO PHASES SUPPLY THE TRANSFORMER.In 120/208V three-phase system, the 120V MUST come from a transformer connected to two of the phases. The 120V phase to ground voltage cannot be used.

Current:

The current signal is taken from the REMAINING phase. This current sample passes through the Range Finder Toroid. It is VERY IMPORTANT that the current signal comes from the phase that IS NOT supplying the 120V control transformer. Be extra careful when the machine has reversing starters or multi-speed windings. If a wrong phase is used the control will either: • Work backwards • Have reduced sensitivity

3575 West 12th Street, Houston, TX 77008tel: 713.972.8666 toll free: 866.MAGPUMP fax: 713.972.8665

www.magnatexpumps.com

PMP-25 Pum

p Protector

Full Scale Capacity at 460 Volts:The Range Finder Toroid has six motor size choices. Select one that is equal or larger than your motor. This will leave some headroom. • For motors less than 5 HP (460 volt), take extra turns. • For motors greater than 50 HP, use Range Finder Toroid

+ Current Transformer.

Multipliers:

For motor sizes or capacities not in table:%Full Load = Full Scale Capacity x 100

Your Motor Size

tel: 713-972-8666 fax: 713-972-8665 www.magnatexpumps.com inquiries@magnatexpumps.com

PMP-

25 P

ump

Prot

ecto

r

CO

PY

RIG

HT

2011

MA

GN

ATE

X P

UM

PS

INC

.

Range Finder Toroid

Control can be reset three ways:• Manually with the Reset button on the control.• Remotely with a remotely located reset button or relay.• Automatic with a jumper

Hooking up the Rest

Remote Reset-Momentarily connect Terminal 4 to Terminal 6 for lowMomentarily connect Terminal 5 to Terminal 6 for high

Automatic Reset-Jumper Terminal 4 or 5 to Terminal 6

The terminals for Reset generate a small amount of cur-rent (8-12 milliamps). To reset, you just need to connect the terminal to the circuit common (Terminal 6).

The switches or relays that you use must be suitable for low current (Gold flashed contacts, Reed Relays, Mercury Switches).

For Motors Less than 5HPTake more “turns” of the leg through the Toroid. Each time the wire passes through the Toroid is a “turn”.

4-20 Milliamp Analog OutputThe switches or relays that you use must be suitable for low current (Gold flashed contacts, Reed Relays, Mercury Switches).

Terminal 2 4-20mA PositiveTerminal 3 4-20mA Negative

Use twisted pair or in noisy environments, use shielded cable. Ground shield at other end.

Use the Full Scale capacity from the chart to scale external meter, chart recorders or computers.

THE PMP-25 Powers the 4-20MA SignalDo NoT Use an External DC Powe SupplyThis is one turn This is two turns

Pass secondary of CT through toroid

2”2 3/8”

1 1/8” hole

3 1/2”

For Motors Greater than 50HP

CAUTIONWhen current is flowing through the primary ofthe external current transformer, always have awire between the two brass Terminals on the CT.

If they are left open, dangerous and destructivevoltages can develop.

A Current Transformer is used to reduce the primary current.The 5-amp secondary passes through the Toroid.

3575 West 12th Street, Houston, TX 77008tel: 713.972.8666 toll free: 866.MAGPUMP fax: 713.972.8665

www.magnatexpumps.com

PMP-25 Pum

p ProtectorTO SET FULL SCALE• After hook-up, find your HP, KW or % from the chart.• Decide if you want to display HP, % or KW.

• The cycles through the choices shown below andblinks slowly for each choice. Each press of movesyou to the next choice.

FRONT PANEL SET-UP TIPS1) None of the settings will be changed until you holddown and the fast blinking stops.

2) Five seconds after you have pressed a button, the controlwill return to normal operation.

3) If you hold down the digits will continue to change.

4) You only need to do when you install the PMP-25(or if you change the hook-up).

ADJUSTMENTSSET POINT - HIGH: The HIGH relay will switch when the loadis above the HIGH.SET POINT - LOW: The LOW relay will switch when the loadis below the LOW.

Start-up TimerThe Start-up Timer bypasses the Control during motor startupto avoid false trips because of current inrush. For convenience,the TIMING BEGINS WHEN THE MOTOR STARTS.The Start-up LED stays lit until the start-up period is over.

The start-up time should be:• Long enough so that the load has stabilized.

Delay TimersTo avoid nuisance trips from short overloads, Delay Timersbypass the Control for the selected time. The relays won’t tripuntil the time is exceeded. If the trip condition goes awaybefore the time is up, the timer resets to zero.• Start with minimum Delay. If you are getting trips where you

don’t want them, increase the Delay Time.

TO VIEW AND CHANGE THE SET POINTSAND DELAY TIMES

cycles through the choices. The LED for each choicewill turn ON.

To change a setting, use

Press ENTER until quick blinking stops to store your newchoice.

After 5 seconds if you haven’t pressed any buttons, controlwill return to normal operation.

ADJUSTMENT TIPS FOR CENTRIFUGAL PUMPSFrom Pump CurvesUse the recommended minimum and maximum flows andhorsepower for your initial set points.

–OR–

Actual OperationLow Trip - Run the pump with the OUTLET valves closed.This is the minimum flow. Set the low trip about here.High Trip - Run the pump with all valves wide open.This is the maximum flow. Set the high trip about here.• Make adjustments if you get nuisance trips